diff --git a/.env.sample b/.env.sample
index 41e29fbe34..02ab305228 100644
--- a/.env.sample
+++ b/.env.sample
@@ -61,7 +61,6 @@ AZURE_COSMOSDB_MONGO_VCORE_CONNECTION_STRING=
 AZURE_COSMOSDB_MONGO_VCORE_DATABASE=
 AZURE_COSMOSDB_MONGO_VCORE_CONTAINER=
 AZURE_COSMOSDB_MONGO_VCORE_INDEX=
-AZURE_COSMOSDB_MONGO_VCORE_INDEX=
 AZURE_COSMOSDB_MONGO_VCORE_TOP_K=
 AZURE_COSMOSDB_MONGO_VCORE_STRICTNESS=
 AZURE_COSMOSDB_MONGO_VCORE_ENABLE_IN_DOMAIN=